Department of Environmental Engineering, Technical University of Denmark, Bygningstorvet, Building 115, 2800 Kgs. Lyngby, Denmark.
Udviklingssamarbejdet, c/o, Lynettefællesskabet, Refshalevej 250, 1432 Copenhagen, Denmark.
Sci Total Environ. 2014 Aug 15;490:1065-72. doi: 10.1016/j.scitotenv.2014.05.079. Epub 2014 Jun 9.
We investigated the possibility of applying performic acid (PFA) and peracetic acid (PAA) for disinfection of combined sewer overflow (CSO) in existing CSO management infrastructures. The disinfection power of PFA and PAA towards Escherichia coli (E. coli) and Enterococcus was studied in batch-scale and pre-field experiments. In the batch-scale experiment, 2.5 mg L(-1) PAA removed approximately 4 log unit of E. coli and Enterococcus from CSO with a 360 min contact time. The removal of E. coli and Enterococcus from CSO was always around or above 3 log units using 2-4 mg L(-1) PFA; with a 20 min contact time in both batch-scale and pre-field experiments. There was no toxicological effect measured by Vibrio fischeri when CSO was disinfected with PFA; a slight toxic effect was observed on CSO disinfected with PAA. When the design for PFA based disinfection was applied to CSO collected from an authentic event, the disinfection efficiencies were confirmed and degradation rates were slightly higher than predicted in simulated CSO.
我们研究了过氧乙酸（PFA）和过氧乙酸（PAA）在现有合流制污水溢流（CSO）管理基础设施中用于消毒的可能性。在批量实验和预现场实验中研究了 PFA 和 PAA 对大肠杆菌（E. coli）和肠球菌的消毒能力。在批量实验中，2.5 mg/L PAA 在 360 分钟接触时间内从 CSO 中去除了约 4 个对数单位的大肠杆菌和肠球菌。使用 2-4 mg/L PFA，在批量实验和预现场实验中接触 20 分钟，大肠杆菌和肠球菌从 CSO 中的去除率始终在 3 个对数单位左右或以上。当用 PFA 对 CSO 进行消毒时，未测量到发光杆菌的毒理学效应；用 PAA 对 CSO 进行消毒时，观察到轻微的毒性效应。当将基于 PFA 的消毒设计应用于从真实事件收集的 CSO 时，确认了消毒效率，并发现实际 CSO 中的降解速率略高于模拟 CSO 中的预测值。
